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The CLS_SHOM v. 98.2 Mean Sea Surface (m) , with a 1/16° grid. The dominant features are the large scale undulation of the geoid, but many tectonic features of the ocean floor are observed.
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Estimation error map of the Mean Sea Surface, providing an a-posteriori evaluation of the MSS accuracy (cm). This figure shows the limit of T/P data (66°N and 66°S), and the poor accuracy in the polar areas where ERS-1 data only are available.
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Short wavelengths of the Mean Sea Surface. The MSS has been high-pass filtered (2D Wiener filter with a 2000 km cutoff wavelength), revealing in this picture the signature of the ridge, the seamounts and many tectonic features in the Pacific ocean.
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The oceanic mean dynamic topography : a byproduct of the MSS CLS_SHOM. v. 98.2 obtained by subtracting the EGM96 geoid to the MSS, then filtering the wavelengths shorter than 10 degrees. This map represents the mean ocean state during the year 93-94-95. The general shape of the mean circulation can be recognised : the gyre and their intensified western boundary currents are present. However, geoid undulation errors are still contaminating this estimation of the oceanic "permanent" dynamic topography.
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